Carpenter Bees in Collin County, TX | Identification and Control
Carpenter bees, also called wood bees, are the large solitary bees drilling perfectly round half-inch holes into fascia boards, cedar fences, pergolas and deck wood across Collin County. They look like bumblebees but have a shiny, bare-looking rear half. The damage grows every year the same boards are reused, and Ohio State University Extension says one tunnel can extend up to 10 feet when many carpenter bees use it over the years. Woodpeckers digging for the young bees inside make it worse. Treating the tunnel before sealing the hole is the rule that decides whether treatment works.
Round holes in your fascia or fence in Collin County? Our office sits where McKinney, Plano, Frisco and Allen meet, 5 to 10 minutes from most homes in those four cities. Send us a photo or call, and we will tell you what is drilling your wood.
Carpenter Bee
Carpenter bees are solitary nesters, with no colony, no queen and no swarm. Each female drills and stocks her own tunnel.
Risk Assessment
Choose a row for the full detail- Color
- Eastern has a hairy yellow-orange middle, southern is all black or blue-black
- Key visual
- Shiny, bare-looking black rear half, the fastest way to rule out a bumblebee
- Can it sting
- Females can but rarely do. Males have no stinger at all
- Entry hole
- Perfectly round, about 1/2 inch (12-13 mm) across, in unfinished wood
- Tunnel length
- 4 to 6 inches when new, several feet once reused over many seasons
- Active season
- Late February to October in Collin County, with the peak in April and May
- Body length
- Eastern 0.75 to 1 in (19-25 mm), southern 0.6 to 1 in (15-25 mm)
What a Carpenter Bee Looks Like
Two carpenter bee species are active in Collin County. The eastern carpenter bee (Xylocopa virginica) is the larger and more common, with a hairy yellow-orange middle and a shiny, smooth-looking black rear half. The southern carpenter bee (Xylocopa micans) is a little smaller and entirely black or dark metallic blue-black with dark wings. Texas A&M AgriLife Extension says the largest carpenter bees range from 3/4 to 1 inch long (Texas A&M AgriLife Extension).
The two sexes act differently. The male, which in the eastern species has a white or yellow patch on its face, hovers at face height in front of the holes and charges anything that comes close. The female does not hover. She flies straight to the entry hole and does all of the drilling.
How to identify a carpenter bee by its shiny rear half, hairy middle and round entry hole
- Perfectly round, smooth 1/2-inch hole in unfinished wood with yellowish sawdust below it
- Large bee with a shiny, hairless-looking black rear half hovering at the same wood surface
- Yellowish-brown staining on the wood below the hole, which is bee excrement
- Deep buzzing or scraping from inside the wood, especially in the early morning
- Ragged woodpecker damage next to the round entry holes
Other Names for the Carpenter Bee
Every name for this bee comes from what the female does. She chews through solid wood to build her nest, so homeowners call her a wood bee, a boring bee or a drill bee. All of these mean the same two Collin County species in the table, so if you searched for any of them, this is your bee.
| Name | What it means |
|---|---|
| Wood bee | The most common name around Collin County, named for the wood it drills into. |
| Boring bee | Named for the round tunnel it bores into fascia, fences and decks. |
| Drill bee | The same idea again, for the perfectly round hole that looks drilled. |
| Eastern carpenter bee | Xylocopa virginica, the larger and more common species here, with a yellow-orange hairy middle. |
| Southern carpenter bee | Xylocopa micans, slightly smaller and entirely black or blue-black. |
How to Tell Carpenter Bees from Other Large Bees
The most common mix-up in Collin County is calling a carpenter bee a bumblebee. Only the bees a homeowner could realistically mistake for a carpenter bee at a glance are listed here.
| Species | Size | Key Feature | Nesting Habit |
|---|---|---|---|
|
Carpenter Bee
AKA: Wood Bee
Xylocopa spp.
This species
|
19 to 25 mm for the eastern species and 15 to 25 mm for the southern. The rear half is shiny and hairless-looking. | Shiny, bare-looking black rear half. Drills perfectly round 1/2-inch holes in unpainted or weathered wood. Males hover aggressively but cannot sting. | Its own tunnel drilled into fascia boards, cedar fences, pergolas and deck lumber. No comb and no honey. One to a few bees per entry hole. Does not nest in the ground or in wall voids. |
|
Bumblebee
AKA: Bumble Bee
Bombus spp.
|
15 to 25 mm depending on species. Rounder and more barrel-shaped than a carpenter bee. | Dense yellow and black hair all the way to the tail, in bands. Never bores holes in wood. | Small ground cavities or old rodent burrows. A small social colony of 50 to 400 that dies at the first freeze and does not overwinter. |
Honey Bee
AKA: Honeybee
Apis mellifera
|
12 to 15 mm, noticeably smaller than a carpenter bee. Golden-brown with moderate hair and a narrower profile. | Much smaller at a glance. Foraging workers carry orange or yellow pollen on their hind legs. A loud collective hum when the nest is disturbed. Never bores into wood. | Wall voids, hollow trees and structural cavities. A large, permanent colony that builds wax comb and honey, with an entirely different removal process. |
Carpenter Bee vs Bumblebee
The Carpenter Bee in Three Numbers
6 to 10
Ohio State University Extension says one female carpenter bee often builds 6 to 10 cells for her young in a row inside a single tunnel.
Ohio State University Extension
1 year
Penn State Extension says a carpenter bee living on its own usually lives about one year.
Penn State Extension
3/4 to 1 inch
Texas A&M AgriLife Extension says the largest carpenter bees range from 3/4 to 1 inch long.
Texas A&M AgriLife Extension
Do Carpenter Bees Sting?
Rarely. Only the female has a stinger, and she uses it only when she is picked up or pinned against skin. The male that hovers at your face and charges you has no stinger at all. His dive-bombing is a territorial display to guard the holes the female drilled, and he cannot hurt you however close he gets.
The female does not guard her hole the way social insects guard a colony. She is busy drilling and stocking her tunnel, so under normal yard and porch conditions a sting takes deliberate contact with the bee.
Are Carpenter Bees Dangerous?
Not to most people. There is no colony to defend, so disturbing one female at her hole never brings other bees in after you. That is the difference from paper wasps, yellowjackets and bald-faced hornets, where touching a nest sets off dozens or hundreds of workers at once.
The exception is a diagnosed bee-venom allergy, where any bee sting can trigger anaphylaxis. Get emergency care at once if a sting brings trouble breathing, hives spreading beyond the sting, or a tight throat.
When Carpenter Bee Activity Warrants Action
Bees at a Doorway in a Home with a Venom Allergy
If someone in the house has a known bee-venom allergy and the holes sit beside an entry door or a busy outdoor space, treatment becomes urgent for health reasons, whatever the state of the wood.
A Male Hovering at Your Porch
A bee charging your face on the porch is a male defending his patch. He has no stinger, so he is no risk to you. He is a sign that a female is drilling nearby, which is a wood problem, not a safety one.
How the Damage Grows Inside the Wood
A new tunnel follows a set pattern. The female bores straight in about one inch, turns 90 degrees and tunnels along the grain for 4 to 6 inches. She builds 6 to 10 cells in a row, according to Ohio State University Extension, then stocks each with pollen and nectar, lays one egg in each and seals it with chewed wood pulp. Returning females reuse and extend the same tunnel instead of drilling a new one, and reused tunnels extend several feet through connected boards, according to Penn State Extension. A tunnel can extend up to 10 feet when many carpenter bees use it over the years, according to Ohio State University Extension, while the outside of the board looks only lightly marked.
Two kinds of debris collect below an active hole: coarse yellowish sawdust from the digging and yellow-brown staining from bee excrement. The sawdust washes away in rain, but the stain and the round hole stay visible all year.
Carpenter Bee Targets Across Collin County
Unfinished or weathered wood is what every high-pressure property shares. Across McKinney, Allen, Frisco and Plano, the usual targets are cedar or pine fences that were stained but never sealed with a film-forming finish, pergolas and arbors of cedar or Douglas fir, deck fascia left unpainted, and exterior trim that was never fully painted.
Woodpeckers make the damage worse. Red-bellied and downy woodpeckers in Collin County find the young bees by the faint sounds and vibrations inside the wood, then dig in hard. A single red-bellied woodpecker can open 3 feet of fascia board overnight. Its damage is ragged and irregular, unlike the bee’s clean round hole, and a board opened that way needs replacing, not just treating.
Overwintered adults come out in McKinney during warm spells as early as late February. Pest Me Off service calls for carpenter bees peak in the 2 months of April and May, while females drill new tunnels. A second generation keeps activity going into August. There are two or more generations of carpenter bees a year in much of Texas, according to Texas A&M AgriLife Extension, before activity slows through September and October.
Carpenter Bee Biology Worth Knowing
How Pest Me Off Handles Carpenter Bees
Pest Me Off treats carpenter bees in 4 steps, and the dust goes into the tunnel before any hole is sealed. We treat every active and recently active tunnel, wait out the treatment interval, seal each hole, and then tell you which wood needs paint or a finish.
Find Every Tunnel on the Structure
Before any product goes on, the technician walks the whole structure to find every entry hole, every stain and every patch of woodpecker damage. Activity on one face of a fascia board often means more tunnels on the sides, the underside or the next board. Woodpecker damage is noted for you as a separate item.
Dust Into Each Tunnel
Insecticidal dust goes into each active tunnel through a wand tip that reaches the full tunnel depth, not just the entrance. Dust is the recommended formulation for carpenter bee tunnels, according to Purdue Extension, because the dust spreads through the tunnels as the bee moves in and out and stays active inside after the hole is closed.
Seal the Holes After the Treatment Interval
Once treatment is confirmed complete, each hole is sealed to keep new females out next season and to close the tunnel to woodpeckers. Sealing comes after treatment, never before.
Recommend a Finish for the Exposed Wood
After sealing, the technician checks every exposed wood surface and recommends paint or a film-forming finish where it is needed. Bare cedar, pine and weathered fascia keep drawing new females however well the old tunnels were treated. Boards a woodpecker has opened are flagged for replacement.
& Quick Fixes
How to Get Rid of Carpenter Bees Yourself
You can handle light carpenter bee activity yourself if you keep the order right. Treat the tunnel, wait, then seal, and finish the bare wood so the bees have nothing to come back to.
Why Some DIY Responses Fail for Carpenter Bees
Most DIY attempts that fail make one of the four mistakes below. Each one goes after the hole or the bee you can see and leaves the tunnel, and the female inside it, untouched.
Sealing the Entry Hole First
The most common DIY mistake. The bee sealed inside chews a new exit hole next to the caulk, the tunnel is never treated, and the board now has two holes instead of one.
Spraying Only the Outside of the Hole
Liquid sprayed at the entrance does not reach the bee in the main tunnel, and her contact with it is brief and patchy. Most store-bought liquid sprays never get to tunnel depth.
Going After the Hovering Males
The males do all the visible hovering and charging, but they do no drilling. Killing a male does nothing to the female nesting in the board behind him.
Treating One Hole and Missing the Rest
A board with one visible hole often has more tunnels on its sides, its underside or the next board. Treating only the obvious hole leaves nesting in place for the season and leaves the untreated tunnels open to woodpeckers.
Common Carpenter Bee Questions
What is the big bee drilling round holes in my fascia?
Why are they called wood bees?
Is that big bee hovering at my face going to sting me?
How do I tell a carpenter bee from a bumblebee?
Can I just caulk the holes shut?
Why does the same spot on my fascia get holes every year?
What is the yellowish sawdust below the hole?
What ripped a big section of my fascia open? That was not just a bee hole.
Does painting my wood actually stop carpenter bees?
How do I get rid of carpenter bees?
Round Holes in Your Fascia. We Treat Every Tunnel Before We Seal a Single Hole.
Send us a photo or call. We find every active and old tunnel on the house, dust each one to full depth, seal the holes and tell you which wood needs a finish to stop next spring’s females. McKinney, Allen, Frisco, Plano, and all of Collin County.